.\"   $Id: swapbddvar.3,v 1.1 2002/03/18 11:26:51 ludo Exp $
.\" @(#)swapbddvar.2 2.7 96/07/02 ; Labo masi cao-vlsi; Author : Jacomme Ludovic
.TH SWAPBDDVAR 3 "October 1, 1997" "ASIM/LIP6" "BDD FUNCTIONS"
.SH NAME
swapbddvar \- swaps two contiguous variables.
.so man1/alc_origin.1
.SH SYNOPSIS
.nf
.if n \{\
.ft B \}
.if t \{\
.ft CR \}
#include "bdd101.h"
void swapbddvar( BddSystem, Variable )
  bddsystem \(**BddSystem;
  bddvar     Variable;
.ft R
.fi
.SH PARAMETERS
.TP 20
\fIBddSystem\fP
The \fBbdd\fP system.
.TP
\fIVariable\fP
The variable to swap.
.SH DESCRIPTION
\fBswapbddvar\fP swaps the variable number \fIVariable\fP with
the variable number \fIVariable\fP + 1, in the \fBbdd\fP system \fIBddSystem\fP.
If a null pointer is given, the default \fBbdd\fP system is used.
This function is useful for the \fBbdd\fP nodes reordering.
.br
.SH RETURN VALUE
\fBswapbddvar\fP returns nothing.
.SH ERRORS
.if n \{\
.ft B \}
.if t \{\
.ft CR \}
"variable xxx out of range, error !"
.ft R
.RS
The \fIVariable\fP and \fIVariable\fP + 1, must be valid variables number. 
.RE
.SH EXAMPLE
.ta 3n 6n 9n 12n 15n 18n 21n
.nf
.if n \{\
.ft B \}
.if t \{\
.ft CR \}
#include "bdd101.h"
   bddsystem  \(**BddSystem;
   bddnode    \(**BddNode1;
   bddnode    \(**BddNode2;
   BddSystem  = createbddsystem( 100, 1000, 100, 50000 );
   BddNode1 = addbddvar( (bddsystem \(**)0, 0 );
   BddNode2 = addbddvar( (bddsystem \(**)0, 0 );
   swapbddvar( (bddsystem \(**)0, 0 );
   destroybddsystem( (bddsystem \(**)0 );
.ft R
.fi
.SH SEE ALSO
.BR bdd (1)


.so man1/alc_bug_report.1

